Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a "controlled document". Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
2002 Elantec Semiconductor, Inc.
E
L
2245C,
E
L
2445C
General Description
The EL2245C and EL2445C are dual and quad versions of the popular
EL2045C. They are high speed, low power, low cost monolithic oper-
ational amplifiers built on Elantec's proprietary complementary
bipolar process. The EL2245C and EL2445C are gain-of-2 stable and
feature a 275V/ s slew rate and 100MHz bandwidth at gain-of-2 while
requiring only 5.2mA of supply current per amplifier.
The power supply operating range of the EL2245C and EL2445C is
from 18V down to as little as 2V. For single-supply operation, the
EL2245C and EL2445C operate from 36V down to as little as 2.5V.
The excellent power supply operating range of the EL2245C and
EL2445C makes them an obvious choice for applications on a single
+5V or +3V supply.
The EL2245C and EL2445C also feature an extremely wide output
voltage swing of 13.6V with V
S
= 15V and R
L
= 1k
. At 5V, out-
put voltage swing is a wide 3.8V with R
L
= 500
and 3.2V with R
L
= 150
. Furthermore, for single-supply operation at +5V, output volt-
age swing is an excellent 0.3V to 3.8V with R
L
= 500
.
At a gain of +2, the EL2245C and EL2445C have a -3dB bandwidth of
100MHz with a phase margin of 50. Because of their conventional
voltage-feedback topology, the EL2245C and EL2445C allow the use
of reactive or non-linear elements in their feedback network. This ver-
satility combined with low cost and 75mA of output-current drive
make the EL2245C and EL2445C an ideal choice for price-sensitive
applications requiring low power and high speed.
Connection Diagrams
1
2
3
4
14
13
12
11
5
6
7
10
9
8
OUT1
IN1-
IN1+
V+
OUT4
IN4-
IN4+
V-
IN2+
IN2-
OUT2
IN3+
IN3-
OUT3
EL2445CN & EL2445CS
[14-Pin SO (0.150") & 14-Pin PDIP]
-
+
-
+
-
+
-
+
1
2
3
4
8
7
6
5
EL2245CN & EL2245CS
(8-Pin SO & 8-Pin PDIP)
-
+
-
+
OUT
IN1-
IN1+
V-
V+
OUT2
IN2-
IN2+
Features
100MHz gain-bandwidth
Gain-of-2 stable
Low supply current (per amplifier)
- 5.2mA at V
S
= 15V
Wide supply range - 2.5V to 36V
High slew rate - 275V/s
Fast-settling - 80ns to 0.1% for a
10V step
Low differential gain -0.02% at
A
V
= +2, R
L
= 150
Low differential phase - 0.07 at
A
V
= +2, R
L
= 150
Wide output voltage swing -
13.6V with V
S
= 15V, R
L
= 1k
Applications
Video amplifiers
Single-supply amplifiers
Active filters/integrators
High speed signal processing
ADC/DAC buffers
Pulse/RF amplifiers
Pin diode receivers
Log amplifiers
Ordering Information
Part No.
Package
Tape &
Reel
Outline #
EL2245CN
8-Pin PDIP
-
MDP0031
EL2245CS
8-Pin SO
-
MDP0027
EL2245CS-T7
8-Pin SO
7"
MDP0027
EL2245CS-T13
8-Pin SO
13"
MDP0027
EL2445CN
14-Pin PDIP
-
MDP0031
EL2445CS
14-Pin SO (0.150")
-
MDP0027
EL2445CS-T7
14-Pin SO (0.150")
7"
MDP0027
EL2445CS-T13 14-Pin SO (0.150")
13"
MDP0027
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
Mar
c
h 27,
2002
2
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2245C,
E
L
24
45C
Absolute Maximum Ratings
(T
A
= 25C)
Supply Voltage (V
S
)
18V or 36V
Input Voltage (V
IN)
V
S
Differential Input Voltage (dV
IN
)
10V
Continuous Output Current
40mA
Power Dissipation (P
D
)
See Curves
Operating Temperature Range (T
A
)
-40C to +85C
Operating Junction Temperature (T
J
)
+150C
Storage Temperature (T
ST
)
-65C to +150C
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
.
DC Electrical Characteristics
V
S
= 15V, R
L
= 1k
, unless otherwise specified.
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
V
OS
Input Offset Voltage
V
S
= 15V
25C
0.5
4.0
mV
T
MIN
, T
MAX
6.0
mV
TCV
OS
Average Offset Voltage Drift
[1]
All
10.0
V/C
I
B
Input Bias Current
V
S
= 15V
25C
2.8
8.2
A
T
MIN
, T
MAX
9.2
A
V
S
= 5V
25C
2.8
A
I
OS
Input Offset Current
V
S
= 15V
25C
50
300
nA
T
MIN
, T
MAX
400
nA
V
S
= 5V
25C
50
nA
TCI
OS
Average Offset Current Drift
[1]
All
0.3
nA/C
A
VOL
Open-loop Gain
V
S
= 15V,V
OUT
= 10V, R
L
= 1k
25C
1500
3000
V/V
T
MIN
, T
MAX
1500
V/V
V
S
= 5V, V
OUT
= 2.5V, R
L
= 500
25C
2500
V/V
V
S
= 5V, V
OUT
= 2.5V, R
L
= 150
25C
1750
V/V
PSRR
Power Supply Rejection Ratio
V
S
= 5V to 15V
25C
65
80
dB
T
MIN
, T
MAX
60
dB
CMRR
Common-mode Rejection Ratio
V
CM
= 12V, V
OUT
= 0V
25C
70
90
dB
T
MIN
, T
MAX
70
dB
CMIR
Common-mode Input Range
V
S
= 15V
25C
14.0
V
V
S
= 5V
25C
4.2
V
V
S
= +5V
25C
4.2/0.1
V
V
OUT
Output Voltage Swing
V
S
= 15V, R
L
= 1k
25C
13.4
13.6
V
T
MIN
, T
MAX
13.1
V
V
S
= 15V, R
L
= 500
25C
12.0
13.4
V
V
S
= 5V, R
L
= 500
25C
3.4
3.8
V
V
S
= 5V, R
L
= 150
25C
3.2
V
V
S
= +5V, R
L
= 500
25C
3.6/0.4
3.8/0.3
V
T
MIN
, T
MAX
3.5/0.5
V
I
SC
Output Short Circuit Current
25C
40
75
mA
T
MIN
, T
MAX
35
mA
I
S
Supply Current (per amplifier)
V
S
= 15V, no load
25C
5.2
7
mA
T
MIN
7.6
mA
T
MAX
7.6
mA
V
S
= 5V, no load
25C
5.0
mA
R
IN
Input Resistance
Differential
25C
150
k
Common-mode
25C
15
M
3
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2245C,
E
L
2445C
C
IN
Input Capacitance
A
V
= +1 @10MHz
25C
1.0
pF
R
OUT
Output Resistance
A
V
= +1
25C
50
m
PSOR
Power-supply Operating Range
Dual-supply
25C
2.0
18.0
V
Single-supply
25C
2.5
36.0
V
1. Measured from T
MIN
to T
MAX
.
DC Electrical Characteristics (Continued)
V
S
= 15V, R
L
= 1k
, unless otherwise specified.
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
Closed-Loop AC Electrical Characteristics
V
S
= 15V, A
V
= +2, R
L
= 1k
unless otherwise specified
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
BW
-3dB Bandwidth (V
OUT
= 0.4V
PP
)
V
S
= 15V, A
V
= +2
25C
100
MHz
V
S
= 15V, A
V
= -1
25C
75
MHz
V
S
= 15V, A
V
= +5
25C
20
MHz
V
S
= 15V, A
V
= +10
25C
10
MHz
V
S
= 15V, A
V
= +20
25C
5
MHz
V
S
= 5V, A
V
= +2
25C
75
MHz
GBWP
Gain-bandwidth Product
V
S
= 15V
25C
200
MHz
V
S
= 5V
25C
150
MHz
PM
Phase Margin
R
L
= 1 k
, C
L
= 10pF
25C
50
CS
Channel Separation
f = 5MHz
25C
85
dB
SR
Slew Rate
[1]
V
S
= 15V, R
L
= 1k
25C
200
275
V/s
V
S
= 5V, R
L
= 500
25C
200
V/s
FPBW
Full-power Bandwidth
[2]
V
S
= 15V
25C
3.2
4.4
MHz
V
S
= 5V
25C
12.7
MHz
t
R
, t
F
Rise Time, Fall Time
0.1V step
25C
3.0
ns
OS
Overshoot
0.1V step
25C
20
%
t
PD
Propagation Delay
25C
2.5
ns
t
S
Settling to +0.1% (A
V
= +1)
V
S
= 15V, 10V step
25C
80
ns
V
S
= 5V, 5V step
25C
60
ns
dG
Differential Gain
[3]
NTSC/PAL
25C
0.02
%
dP
Differential Phase
[3]
NTSC/PAL
25C
0.07
eN
Input Noise Voltage
10kHz
25C
15.0
nV/
Hz
iN
Input Noise Current
10kHz
25C
1.50
pA/
Hz
1. Slew rate is measured on rising edge.
2. For V
S
= 15V, V
OUT
= 20V
PP
. For V
S
= 5V, V
OUT
= 5V
PP
. Full-power bandwidth is based on slew rate measurement using: FPBW = SR/(2
*
Vpeak).
3. Video performance measured at V
S
= 15V, A
V
= +2 with 2 times normal video level across R
L
= 150
. This corresponds to standard video levels
across a back-terminated 75
load. For other values of R
L
, see curves.
4
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2245C,
E
L
24
45C
Test Circuit
5
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2245C,
E
L
2445C
Typical Performance Curves
Non-Inverting
Frequency Response
Inverting Frequency Response
Frequency Response for
Various Load Resistances
Equivalent Input Noise
Output Voltage Swing
vs Frequency
Open-Loop Gain and
Phase vs Frequency
CMRR, PSRR and Closed-Loop
Output Resistance vs
Frequency
2nd and 3rd Harmonic
Distortion vs Frequency
Settling Time vs
Output Voltage Change
Supply Current vs
Supply Voltage
Common-Mode Input Range vs
Supply Voltage
Output Voltage Range
vs Supply Voltage
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